Pitman



EDWARD HUBER AND FREDERICK STROBEL, OF MARION, OHIO.

PITMAN.

SPECIFICATION forming part of Letters Patent No. 286,008, dated October2, 1883.

Application filed May 1, 1883. N 0 model.)

To all whom it may concern:

Be it known that we, EDWARD HUBER and FREDERICK STRoBEL, citizens of theUnited States, residing at Marion, in the county of Marion and State ofOhio, have invented certain new and useful Improvements in Pitmen, ofwhich the following is a specification, reference being had therein tothe accompanying drawings.

Our invention relates to pitmen to be used with any machinery whererotary is to be converted into reciprocating motion, and our object isto construct a cheap and durable selfoiling appliance, to be usedmoreparticularly in thrashing-machines or in similar classes ofmachinery where it is essential to combine lightness and strength withcheapness and durability.

In the annexed drawings, making part of this specification, Figure 1represents a longitudinal section; and Fig. 2, a perspective of one ofthe plates, to be hereinafter described.

In the figures, A represents the pitman proper, and B a metallic strapsecured to the head of same. This strap is cast in the shape of anelongated rectangular box with two open sides and an open end. Upon oneside is cast an oil-chamber, C, and upon its end is cast a hub, H. Thishub has an opening made longitudinally through it, in which is cut a female thread and I represents a threaded setscrew, which is made to fitinto said opening, and having over or upon it a jam-nut, J.

D D represent the wrist-box, in two parts, and constructed as usual.This box lies between the sides of the strap, as seen, and isadditionally confined in its place by means of two flanged plates, F andG. The form of these plates with reference to the flanges is fullyrepresented in Fig. 2. The plates differ in only one respect, the plateG having a boss formed upon it on one side around its center. 0 6represent flanges which are formed upon these plates. The flanges ofplate G embrace the sides of the end of the box, (marked D,) while theyextend upward and downward and embrace the sides of the strap B. Theplate F embraces not only the sides of the strap, but also the end ofthe pitman A and the end of that portion of the boxmarked 1). Theseplates are slipped into place from the open end of the strap.

(2 d represent screw bolts, which pass through the two sides ofthe'strap and through the pitman A, being securely held there bysuitable nuts, as represented. The boss upon plate G is indented in suchmanner as to receive the rounded end of the set-screw I.

It will be seen that the oil-chamber O'is provided with a plug orstop-screw, K, for open ing or closing the fillingorifice to saidchamber at pleasure, and it will :alsobe seen that it has an orificeatits ,bottom opening immediately over the junction of the two parts ofthe box D D, for allowing oil to be supplied to the wrist.

In putting the parts of this pitman together the plate G is first passedin at the open end of the strap, then the part D, then part D of thebox, then plate F, and finally the pitman proper, A, is placed betweenthe sides of the strap, and the whole is made fast by means of the boltsd (Z. The setscrew I serves to close up the plate G upon part D of thebox, and thus take up wear on the box or wrist and always keep thepartsfitting snugly.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is

1. The strap B, cast with one end open, with a hub, H, upon the other,and a globe-shaped oil-chamber, 0, upon one side, in combination with awrist-box, a pitman, two plates having flanges at each side and end, anda set-screw, I, the several parts being connected, substantially asspecified.

2. The plates F and G, provided with flanges at each side and end insuch manner as to enable one of them to embrace the pitman, the strap,and on one end of wrist-box. while the other embraces the other end ofwrist-box and the sides and end of strap, substantially as and for thepurpose specified.

In testimony whereof we affix our signatures inpresence of twowitnesses.

EDWARD HUBER. FRED. STROBEL. Witnesses:

E. S. Moonn, J. N, ALsroN.

